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In this article, the editor introduces in detail "how to use objects stored in localStorage in html5". The content is detailed, the steps are clear, and the details are handled properly. I hope that this article "how to use objects stored in localStorage in html5" can help you solve your doubts.

I want to store a JavaScript object localStorage in HTML5, but my object is obviously being converted to a string.

I can use to store and retrieve the original JavaScript type and array localStorage, but the object doesn't seem to work properly. Should I?

This is my code:

Var testObject = {'one': 1,' two': 2, 'three': 3}; console.log (' typeof testObject:'+ typeof testObject); console.log ('testObject properties:'); for (var prop in testObject) {console.log (' + prop +':'+ testObject [prop]);} / / Put the object into storagelocalStorage.setItem ('testObject', testObject); / / Retrieve the object from storagevar retrievedObject = localStorage.getItem (' testObject') Console.log ('typeof retrievedObject:' + typeof retrievedObject); console.log ('Value of retrievedObject:' + retrievedObject)

The console output is

Typeof testObject: object

TestObject properties:

One: 1

Two: 2

Three: 3

Typeof retrievedObject: string

Value of retrievedObject: [object Object]

In my opinion, the setItem method converts the input to a string before storing it.

Solution:

Looking at the Apple,Mozilla and Mozilla documents again, this functionality seems to be limited to dealing with string key / value pairs.

One solution is to serialize the object before storing it, and then parse it when you retrieve it:

Var testObject = {'one': 1,' two': 2, 'three': 3}; / / Put the object into storagelocalStorage.setItem (' testObject', JSON.stringify (testObject)); / / Retrieve the object from storagevar retrievedObject = localStorage.getItem ('testObject'); console.log (' retrievedObject:', JSON.parse (retrievedObject)) After reading this, the article "how to use objects stored in localStorage in html5" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it yourself. If you want to know more about related articles, please follow the industry information channel.

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